Notes:*Revisions to CES over-the-month changes are calculated by comparing each month's second preliminary sample-based over-the-month change to the first preliminary over-the-month change,
the final sample-based over-the month change with the second preliminary over-the-month change, and the final sample-based over-the-month change to the first preliminary over-the-month change.
Monthly employment change figures shown in the table do not reflect subsequent changes due to the introduction of benchmark revisions, seasonal adjustment, or other updates.
Mean absolute revisions indicate the overall magnitude of change to the estimates, while the mean revisions are a measure of whether there is a bias in direction of the revisions.
The closer the mean revision is to zero, the less indication that revisions are predominantly either upward or downward.
**The time periods are before and after implementation of the new, probability-based sample design in 2003. Revision data is not available for part of 2003. Therefore, the time periods inlcuded in each column are as follows:
2nd - 1st: (First period) January 1979 - March 2003; (Second period) May 2003 - Current month
3rd - 2nd: (First period) January 1979 - February 2003; (Second period) May 2003 - Current month
3rd - 1st: (First period) January 1979 - February 2003; (Second period) May 2003 - Current month
Total All Periods: January 1979 - Current month
***NA entries occurred in 2003 due to the implementation of the CES sample redesign.